Harrow



H. L. MACK.

(No Model.)

HARRUW.

Patented NO v. 4, 1890.

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UNITED STATES PATENT GEEICE.

HENRY L. MACK, OF ELLENSBURG, IVASIIINGTON.

HAIR ROW.

SPECIFICATION forming part of Letters Patent No. 440,047, dated November4,1890.

Application filed I une 26, 1890. Serial No. 356,794. (No model.)

To a/ZZ whom t may concern:

Be it known that I, HENRY L. MACK, a citizen of the United States ofAmerica, residing at Ellensburg, in the county of Kittitass and State of"Washington, have invented certain new and useful Improvements inHarrows and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of .this specification.

This invention has reference to harrows of the type generallyrepresented in my patents, No. 400,697, dated April 2, 1889, and No.421,739, dated February 18, 1890; and the present invention consists incertain improvements, hereinafter described and set forth, whereby thetooth-carrying bars are improved, the end hinge-connections of the sameare rendered more durable than heretofore and equally applicable toeither metal or Wooden bars, and the teeth are effectively clamped intoposition.

In theaccompanyiug draw ings, forming part of this specification, Figurelis a plan View of a harrow sect-ion embodying my improvement-s andshowing the employment of both metal and wooden bars. Fig. 2 is a sideview of of Fig. l. Fig. 3 is a detail view of one of the tooth-clampin gplates. Fig. 4 is a detail viewof one of the end hinge-loops inconnection with the clamping-bar. Fig. 5 is a detail perspective view ofa sectional tubular bar.

The frame is preferably formed similar to that disclosed in saidpatents, and consists of a single iron bar bent to form flatsideparallel portions and transverse ends, the latter being turned upward.Upon each of the parallel sides are secured a series of castings a, eachconsisting of a horizontal base-plate, the ends of which are perforatedfor the passage of bolts to secure the casting to the frame, and each ofsaid castings is provided centrally with a vertical ear b, transverselyperforated for the engagement of al clip-bolt c. The tooth-carrying barsA A A2 are each designed to consist of two parallel sections, either ofwood or metal, as may be found desii-able, according to the character ofthe work for which the harrow is designed. As shown in Fig. l, theparallel sections of the bars A A2 represent wooden sections, and theadjacent faces of the sections of the bar A are vertically notched o rrecessed at several points, so that each pair of recesses will present atooth-receiving opening, in which a tooth is securely held at any adjusted vertical height by means of bolts CZ d', which pass through saidsections at either side of each tooth, and have nuts applied to theirprojecting ends, as shown. Instead of notching the adjacent faces of thewooden sections, as stated with reference to bar A, oppositelyarrangedmetallic clamp-plates e e may be arranged in the inner side, of thesections and have their vert-ical portions recessed or notched, whilethey are provided at the lower and upper edges with horizontal flanges,which embrace the section on which they are supported. Vhen suchclamp-plates are elnployed, it will be noted that the securingbolts alsopass through them, as they are pierced for such purpose. Vhen theparallel sections are made from metal, they are comparatively thin, asshown in the construction of the two rear bars A', Fig. l, and may bethicker in order to provide for the increased difference between theparallel sections.

I prefer to construct the hinged loops c and vconnect them to theparallel sections of the adjacent bar, as shown in Fig. 4, wherein theloop is represented as consisting of a long and short member, the formerpassing through one of the sections and seated in an opening in theother section,while the longer member passes through both sections, sothat the threaded projecting end may be engaged by a nut c. The longermember is provided with an annular shoulder c2, resting against the faceof the adjacent section in order to give the hinged loop proper bearing.

As shown in Fig. 5,it willbe convenient to provide tubular barsembodying the same general principle of parallel clamp-sections. Theteeth fare rectangular in cross-section, or at least so at their upperportions5, but it is preferable that they should coincide with the shapeof the recesses presented for them by the sections of the bars.

The construction set forth is simple, dur- IOC ' able, and comparativelyinexpensive, and the teeth can be removably, adj ustably, and rigidlyelamped, as will be understood.

I claiml. The combination, in a harrow, of the main frame having itsside portions provided with perforated ears, toothed carrying-bars, andU-shaped clip-bolts engaging said projections and passing through saidbars, and

secured by nuts, substantially as set forth.

2. The combination, in a harrow, of the main frame having its sideportions provided With perforated ears, tooth-carrying bars, 'eachcomprising two parallel sections, com- Witnesses:

J AMES vP. SMITH, AUGUST SAssE.

HENRY L. MACK.

